TEMPOROMANDIBULAR JOINT bone and Articulation between o Specific features where
ID: 3513703 • Letter: T
Question
TEMPOROMANDIBULAR JOINT bone and Articulation between o Specific features where the articulation is: .Only mobile joint in the skull Actually made up of TWO synovial joints (describe) Hinge joint (chewing) - depress and elevate Giliding joint (biting) - protract and retract AND (grind) -side to side motion Pivot joint (limited) Identify the following ligaments: 1. Sphenomandibular ligament 2. Temporomandibular ligament SHOULDER JOINT 3 joints combined: 1. Sternoclavicular joint a. Saddle joint between- and b. Sternoclavicular ligament c. Costoclavicular ligament 2. Acromioclavicular joint (AC joint) a. Plane joint betweenand b. Acromioclavicular ligament c. Coracoclavicular ligament 3. Glenohumeral joint (also referred to as the "shoulder joint") and a. Ball-and-socket joint between b. Most -joint in the body thus, most frequently dislocated c. Coracoacromial ligament d. Coracohumeral ligamentExplanation / Answer
Temporomandibular joint articulation between mandibular fossa of temporal bone and condyle of mandible.
TMJ made up of two synovial joints on either side between the head of condyle and mandibula fossa of temporal bone. TMJ is a modified hinge type of synovial joint. The surfaces of joints are covered with fibrocartilage. The main components of joint are joint capsule, articular disc, mandibular condyle, articular surface of temporal bone, temporomandibular ligament, stylomandibular ligament, sphenomandibular ligament and lateral pterigoid muscle.
Sphenomandibular ligament
It runs from spine of sphenoid bone to lingula of mandible. Since it is attached to lingula of mandible, it overlaps the opening of mandibular foramen.
Temporomandibular ligament
It has two parts, outer oblique portion and inner horizontal portion. The base of this triangular ligament is attached to zygomatic process of temporal bone and articular tubercle, the apex is attached to lateral side of neck of mandible. This ligament prevent excessive retraction of mandible.
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